bugfix: fix extra dependency annotations

These were being displayed regardless of the dep type
and state of DepDesc. This is fixed with this commit.

Signed-off-by: Kevin Morris <kevr@0cost.org>

templates/partials/packages/package_metadata.html

@@ -16,9 +16,11 @@
                     </a>
                 {% endif %}
                 {{ dep.Package | provides_list(dep.DepName) | safe }}
-                {% set extra = dep | dep_extra %}
-                {% if extra %}
+                <!-- If this dependency type is an optdepends (id: 4). -->
+                {% if dep.DepTypeID == 4 %}
                     <em>{{ dep | dep_extra_desc }}</em>
+                {% else %}
+                    <em>{{ dep | dep_extra }}</em>
                 {% endif %}
             </li>
         {% endfor %}